Data sources and replication codes for Globalization and Wage Polarization, Guido Cozzi and Giammario Impullitti

DATA SOURCES


1. The data for Tables 1 and 2, are taken from David Autor and David Dorn. "The Growth of Low Skill Service Jobs and the Polarization of the U.S. Labor Market." American Economic Review, 103(5), 1553-1597, 2013.
   Available at: http://www.ddorn.net/data.htm

2. The data for Figures 1 and 2, are taken from PIKETTY T., G. ZUCMAN � Capital is back: wealth-income ratios in rich countries 1700-2010 �, Quarterly journal of economics, vol.129, no.3, 2014, p.1155-1210.
   Available at: http://piketty.pse.ens.fr/en/capitalisback

3. The data for Figure 3 are taken from United States Patent and Trademark Office, available at: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/cst_allh.htm.

These data are sufficient to replicate our calibration and quantitative analysis results.


MATLAB REPLICATION CODES

1. cALIBRATION

Threee files are needed to replicate the calibration exercise:

i. CIcali_Piketty.m: this file containts the system of equations characterizing the model equilibrium.
ii. Cali_fun_Piketty.m: here you can find the spefication of the objective function of the calibration, the quadratic distance between the model moments and the data targets.
iii. Fmincali_Piketty.m: this runs the minimization routine, which choses the vector of parameters minimizing the distance between the model moments and the data.


2. Comparative statics

The following two files are needed to solve the model numerically using the calibrated parameters and to perform the comparative statics analysis of the effects of a reduction in the technology gap on wage polarization.

i. CIcompstat.m: this is the function file with the equilibrium system of equations.
ii.runCIcompstat.m: this files runs CIcompstat.m using the calibrated parameters, and solve it for many values of the technology gap. The output generates Figure 4 and table 4 in the paper.